Sunday is a surname. Notable people with the surname include:
Billy Sunday (1862–1935), American baseball player and evangelist
Dave Sunday (born 1947), Zambian footballer
David Sunday, Nigerian footballer
Gabriel Sunday (born 1985), American actor
Helen Thompson Sunday (1868–1957), American evangelist
Ibrahim Sunday (born 1950), Ghanaian footballer
Johnson Sunday (born 1981), Nigerian footballer
Obaji Sunday (born 1988), Nigerian footballer
Patrick Sunday (born 1975), Nigerian footballer
Stephen Sunday (born 1988), Nigerian-born Spanish footballer
